/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.fs.dummy;

import org.apache.flink.core.fs.FSDataInputStream;
import org.apache.flink.core.memory.ByteArrayInputStreamWithPos;

import java.io.IOException;

class DummyFSInputStream extends FSDataInputStream {
	private final ByteArrayInputStreamWithPos stream;

	private DummyFSInputStream(ByteArrayInputStreamWithPos stream) {
		this.stream = stream;
	}

	static DummyFSInputStream create(byte[] buffer) {
		return new DummyFSInputStream(new ByteArrayInputStreamWithPos(buffer));
	}

	@Override
	public void seek(long desired) throws IOException {
		stream.setPosition((int) desired);
	}

	@Override
	public long getPos() throws IOException {
		return stream.getPosition();
	}

	@Override
	public int read() throws IOException {
		return stream.read();
	}
}
